280results about How to "Improve mechanical stability" patented technology

The invention discloses a coated titanium anode and an embedding preparation method thereof, and belongs to the technical field of coated titanium anodes, metal salt powder, an organic additive and inert filler are fully mixed to form embedding agent powder, the mass fraction of metal salt is 45-59%, the mass fraction of the organic additive is 1-5%, and the mass fraction of the inert filler is 40-50%; the sintering treatment is as follows: the pretreated titanium substrate is completely immersed in the embedding agent powder, the sintering temperature is 400-600 DEG C, the sintering time is 1-3 hours, and the heating rate is 5-10 DEG C / min. According to the method, low-temperature sintering is realized by precisely regulating and controlling the components and the proportion of the embedding medium and combining process parameters such as low-temperature sintering, and the damage to a titanium substrate is avoided; and meanwhile, the coating binding force of the titanium anode is improved, the service life of the titanium anode is prolonged, and technical innovation and industrial value are achieved.

The invention relates to the technical field of special polymer functional membranes, and discloses a polybenzimidazole gas separation membrane as well as a preparation method and application thereof, the polybenzimidazole gas separation membrane has an interpenetrating network-shaped pore structure, and the polybenzimidazole gas separation membrane has a nanoscale pore structure. The pore size distribution of the nanoscale pore structure is 0.1-30 nm, and the average pore size of the nanoscale pore structure is 1-80 nm. The polybenzimidazole gas separation membrane has an interpenetrating network-shaped pore structure and a nanoscale pore structure, so that the polybenzimidazole gas separation membrane has relatively high gas selectivity and permeability coefficient and also has relatively good mechanical properties.

The invention relates to the technical field of biological medicines, in particular to a soluble skin-adhering microneedle for delivering an inactivated enterovirus vaccine as well as a preparation method and application of the soluble skin-adhering microneedle. Sodium hyaluronate is adopted as a film forming material to wrap an enterovirus 71 type (EV71)-coxsackie virus A16 (CA16) type bivalent inactivated vaccine antigen, and a needle body layer of the soluble microneedle is formed; the substrate layer is prepared from a pullulan material, so that the microneedle patch with a stable overall structure is formed. The technology provided by the invention is completed in a clean environment, and the vaccine patch which is qualified through sterility detection is obtained. The soluble microneedle disclosed by the invention has good antigen stability under the condition of 2-8 DEG C. In animal experiments, the microneedle is attached to the skin surface of a mouse for skin-adhering immunization, a strong immune response reaction can be induced, good immunogenicity is shown, and a novel, safe and effective vaccine delivery way is provided for prevention and control of the infantile hand-foot-and-mouth disease.

The invention relates to the technical field of electrolyte, in particular to a thioether cross-linked solid polymer electrolyte membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: taking N, N-dimethylformamide, respectively adding 3, 6-dioxa-1, 8-octane dithiol and triglycidyl isocyanurate, and uniformly stirring to obtain a mixed solution; adding bis (trifluoromethylsulfonyl) imide lithium into the mixed solution, putting magnetons on a magnetic stirrer, and completely dissolving the magnetons to obtain a precursor solution; and pouring a proper amount of the precursor solution into a polytetrafluoroethylene mold, spreading, and carrying out cross-linking polymerization in a blast oven to form the film. The three-dimensional thioether cross-linked network structure has a large number of weakly coordinated thioether groups, dissociation of lithium salt can be promoted, a large number of free Li < + > is generated, the number of Li < + > is increased, meanwhile, the crystallinity of a polymer is remarkably reduced, the ionic conductivity is improved, the mechanical stability of a film can be improved, and the service life of a battery is effectively prolonged.

The application discloses a preparation method of a sodium ion battery hard carbon negative electrode material based on step-by-step synergistic regulation, and comprises the following steps: S1, biomass pretreatment; S2, low-temperature pre-carbonization to obtain biomass pre-carbonized carbon; S3, physical activation: the pre-carbonized carbon is placed in an activation atmosphere to perform medium-temperature activation, and biomass activated carbon is obtained; S4, high-temperature carbonization: the biomass activated carbon is placed in an inert atmosphere to perform high-temperature carbonization, and a hard carbon intermediate is obtained; S5, chemical vapor deposition coating: the hard carbon intermediate is placed in a mixed atmosphere of a coating carbon source and an inert gas to perform chemical vapor deposition coating, and a surface-coated biomass hard carbon negative electrode material is obtained. The application can realize a higher closed pore volume at a milder temperature, and the synergistic regulation pore forming mode of activating and forming pores first and then high-temperature closing pores also avoids the insufficient closed pores caused by single high-temperature treatment.

The invention provides a ferronickel-based oxygen evolution electrode and a preparation method thereof based on interface confinement. The preparation method of the ferronickel-based oxygen evolution electrode comprises the following steps: preparing a precursor solution containing ferrous ions and ferric ions; the foamed nickel substrate is cleaned; the cleaned foamed nickel is tightly attached to the surface of the bottom of the reaction container, the foamed nickel is immersed in the precursor solution, under the room-temperature standing condition, divalent and trivalent iron ions are induced to be subjected to a synergistic hydrolysis and coprecipitation reaction through a physical interface confinement space formed by an attached interface, and the nickel-based composite material is obtained. Therefore, a high-activity and high-uniformity nickel-iron-based (oxygen) hydroxide catalyst layer (DIC-NiFeOOH / NF) is grown on the surface of the foamed nickel in situ. The method is simple in process, green and energy-saving, and the prepared nickel-iron-based oxygen evolution electrode shows excellent performance in oxygen evolution reaction and anion exchange membrane water electrolysis.

This invention belongs to the field of acoustic-to-electric conversion technology, and discloses an aerogel acoustic-to-electric conversion device with both sound absorption and power generation functions, as well as its preparation method. The aerogel acoustic-to-electric conversion device of this invention includes a nanofiber aerogel layer, electrode layers respectively disposed on opposite sides of the nanofiber aerogel layer, and a clamp for fixing the nanofiber aerogel layer and the electrode layers. The nanofiber aerogel layer comprises a three-dimensional porous structure composed of piezoelectric nanofibers. The electrode layers include a substrate and a conductive layer disposed on one side of the substrate. The electrode layers have a through-hole array, and the conductive layer is in contact with the nanofiber aerogel layer. The aerogel acoustic-to-electric conversion device of this invention can achieve the conversion of sound wave-induced mechanical energy into electrical energy while maintaining the sound absorption performance of the aerogel, and is suitable for scenarios such as noise absorption, sound energy harvesting, and self-powered sensing.

The invention discloses a composite modification film, a lithium metal negative electrode and a preparation method of the lithium metal negative electrode. The composite modified film comprises an organic polymer solid electrolyte, an inorganic solid electrolyte and a film-forming agent, and the mass ratio of the organic polymer solid electrolyte to the inorganic solid electrolyte to the film-forming agent is (10%-35%): (10%-35%): (30%-80%). The composite modified film effectively buffers cyclic stress, prevents early mechanical failure of the protective layer, and realizes mechanical durability of the interface protective layer; the immobilized film-forming agent can be slowly released, so that the continuous and stable repair of SEI is realized, the dynamic repair capability of the whole life cycle is provided, and the efficient cycle life of the battery is greatly prolonged; and the electrolyte does not need to depend on a high-concentration liquid additive, dramatic change of electrolyte components in circulation is avoided, the overall chemical stability of the battery is improved, and the stability of an electrolyte system is guaranteed.

The invention discloses an ionic gel moisture power generation and power supply system and a preparation method and application thereof, and belongs to the technical field of functional materials and waste gas monitoring. According to the system, dopamine, 1-vinyl imidazole, n-bromobutane and acrylic acid are used as raw materials, and an ionic gel moisture power generation material is prepared through an ultraviolet curing process; carbon cloth is used as an electrode to assemble a moisture power generation device, the device is integrated with a plastic pipe, and stable power support is provided for a waste gas monitoring sensor in the pipe. The ionic gel prepared by the invention has excellent cohesiveness, moisture responsiveness, ionic conductivity and mechanical stability, and the ultraviolet curing process is efficient and environment-friendly; the moisture power generation device can utilize environmental moisture to continuously generate power, solves the problem that a traditional waste gas monitoring sensor depends on an external power supply or frequently replaces a battery, is adaptive to a complex application scene of a plastic pipe, and has a wide industrial application prospect.

The invention discloses an anaerobic denitrifying bacterial agent as well as a preparation method and application thereof, and belongs to the technical field of water environment treatment. The anaerobic denitrifying bacterium agent is prepared from the following components in parts by weight: 15 to 30 parts of sterile water, 15 to 60 parts of normal saline, 5 to 10 parts of micro-capsule embedded anaerobic denitrifying bacteria, 5 to 20 parts of a porous composite modified carrier, 10 to 30 parts of a carbon source, 4 to 7 parts of nutrient elements, 2.5 to 4 parts of a buffering agent and 1 to 5 parts of a stabilizer, the micro-capsule embedded anaerobic denitrifying bacteria are obtained by embedding anaerobic denitrifying bacteria with an alginic acid gel solution and a calcium chloride solution; the porous composite modified carrier is obtained by crosslinking modified nano iron oxide, modified nano titanium dioxide, a functional polymer solution and glutaraldehyde. The anaerobic denitrifying bacterial agent provided by the invention can effectively improve the efficiency of treating nitrogen pollution of a water body.

The utility model relates to the technical field of hairdressing equipment, in particular to a rotary adjustable hair curling rod which comprises a shell, a hair curling assembly, a rotary shifting piece and an upper limiting block. The gear set of the rotary base is meshed with the driven gear, and the second gear teeth of the rotary shifting piece are meshed with the gear set, so that accurate rotation control over the curling iron is achieved, the curling angle and the curling direction can be adjusted more flexibly and stably, the curling effect and the user experience are improved, and the practicability is high. The heating piece is guided through the first moving guide rail and the second moving guide rail, the stability and accuracy of the heating piece in the hair curling process are guaranteed, the problems that a traditional hair curling rod is uneven in heating and unsmooth in hair curling are solved, the hair curling quality is effectively improved, and the upper limiting block and the top cover improve the structural stability of the hair curling rod and improve the hair curling efficiency. And in addition, the use safety is improved, the heating piece is prevented from accidentally falling off or shifting, and safer and more reliable use experience is provided for a user.

The application discloses a kind of wide temperature range stable copper cluster scintillator and its preparation method and application, the scintillator chemical general formula is Cu4X4 (dppyme) 2, by introducing methyl in pyridine ring 6 position structure space constraint, induce to form long-range ordered crystal packing phase, significantly enhance the lattice rigidity.This material has the microcosmic energy level structure of thermal activation delayed fluorescence (TADF) and self-trapped excitor (STE) light emitting mechanism synergism, in-190 ℃ to 150 ℃ extremely wide temperature range, excellent radiation luminescence stability is shown.The application is prepared by room temperature solution method, and process is simple.The flexible film constructed using the material improves the mechanical stability by polymer embedding process, and the spatial resolution reaches 27.8 lp / mm, which is suitable for X-ray detection and imaging in extreme environments such as deep space exploration, polar scientific research and high-temperature industrial detection.

The utility model discloses a kind of photosensitive chip packaging structures, including circuit board, fixed filling adhesive layer, CIS photosensitive chip, support adhesive layer, wrapping filling adhesive layer, optical filter and multiple pads.CIS photosensitive chip is fixed on the top of circuit board by fixed filling adhesive layer, and the photosensitive area is jointly constituted by the support adhesive layer of setting in its outer edge and the top optical filter Sealing chip inner cavity;Photosensitive chip and circuit board are connected by multiple gold wires, and are packaged by wrapping filling adhesive layer to prevent gold wire exposure, improve structural stability.The utility model structure is packaged by optimization, effectively prevent gold wire fracture, and by reducing chip inner cavity volume, reduce the risk of fogging caused by air thermal expansion, to improve the stability and imaging reliability of photosensitive chip, applicable to the image acquisition equipment of higher imaging quality requirement.

This invention belongs to the field of solid-state electrolyte technology, specifically relating to a high-pressure resistant composite polymer solid-state electrolyte, its preparation method, and its application. The solid-state electrolyte comprises: a high-pressure resistant terpolymer, a PVDF-based polymer, mullite filler, and a lithium salt; the high-pressure resistant terpolymer is prepared from a high-pressure resistant additive, a crosslinking agent, ethylene ethylene carbonate monomer, and an initiator; the high-pressure resistant additive is selected from at least one of propylene-1,3-sulfonyl lactone, cyclobutene sulfone, and 3-methyl-3-cyclobutene sulfone. The preparation method is as follows: the high-pressure resistant additive, crosslinking agent, initiator, lithium salt, and ethylene ethylene carbonate monomer are mixed to obtain a precursor solution; the PVDF-based polymer and mullite filler are stirred and mixed in a solvent, coated into a film, and vacuum dried to obtain a base film; the base film is immersed in the precursor solution, and after immersion, it is cured to obtain the high-pressure resistant composite polymer solid-state electrolyte.

The application discloses a negative active material, a preparation method of the negative active material, a secondary battery and an electric device, and the negative active material comprises a silicon-based material, a carbon coating layer arranged on the surface of the silicon-based material, and a titanium oxide layer arranged on the surface of the carbon coating layer, and the electron paramagnetic resonance spectrum of the negative active material has a characteristic peak at g=2.002-2.004. The application sets the titanium oxide layer containing oxygen defects on the surface of the carbon-coated silicon-based material, improves the rate performance on the basis of improving the initial coulomb efficiency and the cycle performance, and has a wide application prospect.

The invention discloses a production method of a PA / PE high-barrier composite film bag. The composite film bag comprises an outer layer, a middle layer and an inner layer, the outer layer is prepared from PA6, glass fibers, maleic anhydride grafted polyethylene, an antioxidant, a slipping agent, an ultraviolet light absorber, titanium dioxide, nano silicon dioxide and polyimide; the middle layer is prepared from EVOH (Ethylene Vinyl Alcohol), polyamide-imide, nano montmorillonite, maleic anhydride grafted polypropylene, an antioxidant, a slipping agent, terpene resin, polyvinylidene chloride and polybutylene terephthalate; the inner layer is prepared from HDPE, LLDPE, mPE, an antistatic agent, silicon dioxide, dioctyl phthalate, an antibacterial agent and polylactic acid. The composite film bag prepared by the invention not only has high barrier property and good strength, but also has various functions.

This invention discloses a method for preparing a multifunctional slow-release fertilizer. First, a porous carrier is prepared by co-precipitation and calcination of iron tailings acid leaching solution and aluminum salts. Nutrient solution is loaded onto the carrier, dried, and granulated to obtain fertilizer particles. A bio-based composite coating precursor solution is prepared by mixing nanocellulose whiskers, sodium alginate, polyacrylic acid, and fumed silica, and a calcium chloride-chitosan solution is used as a crosslinking agent to obtain fertilizer particles. Finally, fluidized bed coating technology is used to sequentially spray the coating precursor solution and crosslinking agent solution onto the surface of the fertilizer particles. After two coating processes and drying, a multifunctional slow-release fertilizer is obtained. This invention combines the preparation of an industrial solid waste resource utilization carrier, the construction of a bio-based composite coating, and a rhizosphere-responsive slow-release design to prepare a multifunctional slow-release fertilizer. This fertilizer not only has low preparation cost but is also rich in nutrients, has good slow-release performance, and excellent mechanical stability.

A pulley and its control method. This invention belongs to the field of power transmission construction technology and discloses a pulley, including a pulley body, a guide wheel assembly, a limiting assembly, an image recognition assembly, and a controller. The guide wheel assembly is disposed on the pulley body and includes at least one first guide wheel with an annular first guide groove. The limiting assembly is disposed on the pulley body and above the first guide wheel. The limiting assembly includes a limiting state that cooperates with the first guide wheel to form a first limiting space to limit the conductor and a retracted state that moves away from the first guide wheel. The image recognition assembly is disposed on the pulley body and above the first guide wheel and is used to identify the positions of the conductor and the first guide wheel. The controller is electrically connected to the image recognition assembly and the limiting assembly and is used to control the limiting assembly to switch between the limiting state and the retracted state. The pulley of this invention can monitor the dynamic deviation of the conductor in real time and interfere with the conductor's operating state.

The application discloses a fast-axis collimating lens and an optical device with the same, and relates to the technical field of laser optical elements. The fast-axis collimating lens comprises a cylindrical base and a composite film layer arranged in sequence along the direction of incident light. The light-in surface of the cylindrical base is a plane, the light-out surface of the cylindrical base is a convex surface, and the radius of curvature of the cylindrical base is greater than 2.5 mm. The composite film layer comprises at least one high-refractive-index transmission film layer, and the refractive index of the high-refractive-index transmission film layer ranges from 1.8 to 2.4. The fast-axis collimating lens is used to realize the collimating function by the synergic design of the film layer and the base structure, the low-convexity base is matched with the high-refractive-index transmission film layer, the processing and integration are facilitated, and the optical and mechanical properties are effectively improved.

The invention relates to the technical field of graphene oxide composite membrane water treatment, and discloses a novel graphene oxide composite membrane with a persistent dye separation function and a preparation method thereof.The preparation method of the novel graphene oxide composite membrane with the persistent dye separation function comprises the following steps that graphene oxide and UiO-66-NH2 are prepared; the preparation method comprises the following steps: preparing a TBO (at) UiO-66-NH2 / GO composite solution containing graphene oxide, UiO-66-NH2 and a toluidine blue O solution; the TBO-coated UiO-66-NH2 / GO composite liquid is loaded to the surface of a PES film, and the novel graphene oxide composite film with the persistent dye separation function is obtained; according to the novel graphene oxide composite membrane disclosed by the invention, a'vertical support-horizontal screening 'synergistic structure is constructed, and the dye separation performance and stability of the membrane are remarkably improved.

The application provides a high-porosity Raney nickel electrode and a preparation method thereof, and relates to the technical field of Raney nickel electrodes and preparation thereof. The preparation method of the high-porosity Raney nickel electrode effectively controls the dealuminization rate and the pore uniformity through a preparation process of'sintering treatment + special electrochemical dealloying treatment', and stably prepares the high-porosity Raney nickel electrode. A new process for preparing the high-porosity Raney nickel electrode in an environmentally friendly manner is provided, which replaces the traditional corrosion pore-forming process of a strong alkaline chemical solution and reduces pollution. The prepared high-porosity Raney nickel electrode has a high porosity of up to 52%, and the pore structure is stable, so that the catalytic activity and mechanical stability of the electrode are effectively improved.

This utility model discloses a battery testing station, which includes a worktable, a screen bracket, a fixed platform, a column, a lifting cylinder, a sliding plate, a reinforcing crossbar, an extension frame, and a scanning gun. The lifting cylinder drives the sliding plate to slide up and down along the column, so that the electrode contact head on the extension frame accurately abuts against the battery electrode, while the scanning gun collects battery identification information. The positioning block ensures accurate battery positioning, and the straight groove design allows for flexible adjustment of the extension frame. This application can improve testing accuracy and efficiency, and is suitable for automated testing scenarios of batteries of various specifications, especially for the needs of large-scale production lines.

The invention discloses a hot-coated high-barrier heavy-wrapping roll film and a preparation method thereof. Belongs to the technical field of packaging materials. The roll film sequentially comprises an outer-layer base material film, a middle barrier layer and an inner-layer heat sealing film. The middle barrier layer is formed by drying and curing nano-composite barrier liquid coated on the inner surface of the outer-layer base material film; the nano-composite barrier liquid comprises polyvinyl alcohol, a surface-modified inorganic nano-material dispersion liquid, a polymer emulsion, a cross-linking agent and a wetting agent. After being preheated, the barrier liquid is coated by micro gravure, is dried through three stages of rapid shaping, deep crosslinking and high-temperature densification in sequence, and is finally compounded with an inner-layer heat-sealing film in a solvent-free manner. Through precise coupling of a synergistic effect among specific components and a multi-stage drying process, the roll film has excellent initial oxygen barrier property, water vapor barrier property, excellent stability in a high-temperature and high-humidity environment and high barrier stability after simulating a dynamic mechanical load of heavy packaging and transportation.

A fiber-reinforced lithium borohydride-based all-solid-state electrolyte for suppressing dendrite formation, its preparation method, and its application are disclosed. The method employs a reverse micelle precipitation method to prepare a precursor solution by dissolving lithium borohydride and lithium iodide in an ether solvent solution. Aluminum oxalate and vapor-grown carbon fibers are then added, followed by dropwise addition to an isopentane solution containing a surfactant. After reverse micelles form, the solution is allowed to settle and react completely, and the solvent is thoroughly removed. The product from the settled reaction is dried and then subjected to partial hydrogen release treatment. The partially hydrogen-released product is dispersed in a benzene solution containing polymethyl methacrylate, freeze-dried, and then melt-reacted in situ in a universal mold. This process is simple and highly controllable, significantly improving the mechanical stability and dendrite resistance of the lithium borohydride-based all-solid-state electrolyte, and enabling long lifespan of all-solid-state lithium batteries under fast-charging conditions, thus facilitating commercial applications.

This invention discloses a highly corrosion- and weather-resistant silicate glass material and its preparation method, comprising the following components by weight: 60-80 parts of a main network component, which forms a silicon-oxygen network framework after melting; 5-15 parts of a network-modifying component, which is distributed within the silicon-oxygen network framework; 5-12 parts of a lattice-stabilizing component; 2-8 parts of a compacting reinforcing component; and 3-10 parts of a lattice-strengthening component, which are dispersed within the silicon-oxygen network framework to form a dense silicate glass matrix. This invention can improve the weathering resistance, groundwater erosion resistance, and long-term structural stability of the glass material, and enhance the internal purity and density of the glass matrix, meeting the needs of deep underground burial and long-term information preservation applications.

The invention discloses a preparation method and application of a degradable hydrogel solar evaporator with a surface microstructure, and relates to the technical field of interface evaporation materials. The invention aims to solve the problems that an existing solar evaporator is low in evaporation efficiency, difficult to recycle after alkaline wastewater treatment, easy to form solid wastes and lack of an in-situ degradation environment-friendly scheme. Functional groups capable of being subjected to hydrolysis reaction under alkaline conditions are introduced into a hydrogel network, and the evaporator with a specific geometric structure is constructed by utilizing a photocuring 3D printing technology, so that the evaporator keeps structural stability and high evaporation performance in a use stage, and can be degraded according to preset conditions in an alkaline environment; therefore, the evaporator can disappear controllably after being used. According to the method, the photocuring 3D printing technology is combined, accurate design of the macroscopic shape and the microstructure of the evaporator is achieved, the surface microstructure of the evaporator is one or more of a spherical structure, a prismatic table structure and a tree-shaped structure, and the evaporation rate can be increased.

The invention provides a production forming device for amorphous strips, and belongs to the technical field of amorphous strip machining. The device comprises a bracket, a hollow rotating shaft, a cooling roller, a reverse cooling cylinder and a circulating pipeline. A cooling medium channel is arranged in the bracket; the hollow rotating shafts are rotationally arranged on the bracket and are respectively communicated with the corresponding cooling medium channels; two ends of the cooling roller are connected with two groups of hollow rotating shafts; the reverse cooling cylinder is located in the cooling roller, and a cooling medium opposite to the flowing direction in the cooling roller circulates in the reverse cooling cylinder; two groups of circulating pipelines are arranged at the two ends of the reverse cooling cylinder; the cold air plate is wound on the outer side of the cooling roller in an arc-shaped structure; and a plurality of groups of ultrasonic atomization plates are uniformly arranged on one side surface, facing the cooling roller, of the cold air plate at intervals. According to the amorphous strip production forming device, the temperature difference of cooling media at the two axial ends of a cooling roller can be reduced, and the alloy liquid cooling efficiency is improved through cooperation of cold air and water mist.

The present application relates to a kind of based on carbonized wood natural structure dopamine electrochemical sensor and its preparation method and application, the working electrode of the electrochemical sensor is modified with carbonized wood-ZnO nanowire-ZIF-8.The electrochemical sensor of the present application uses carbonized wood as substrate, after cutting carbonized wood whole piece, using conductive carbon paste is pasted on working electrode, while ensuring conductivity, also retain the three-dimensional structure of nanomaterial not be destroyed, guarantee the performance of sensor, with good application prospect.

This invention provides a carboxylated nitrile butadiene latex, its preparation method, and its application. The carboxylated nitrile butadiene latex, by mass parts, is composed of the following raw materials: butadiene, acrylonitrile, methacrylic acid, emulsifier, dispersant, electrolyte, ferrous sulfate, reducing agent, molecular weight regulator, oxygen scavenger, initiator, and demineralized water. The emulsifier is a mixture of anionic and cationic emulsifiers; the anionic emulsifier is sodium dodecyl sulfate, and the cationic emulsifier is a glycosyl gemini cationic surfactant. The mass ratio of the anionic emulsifier to the cationic emulsifier is 1:0.05–0.1. This carboxylated nitrile butadiene latex not only has low gel content and high mechanical stability, but its preparation method is also simple and controllable, making it easy for industrial production.